/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:31:03,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:31:03,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:31:03,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:31:03,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:31:03,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:31:03,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:31:03,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:31:03,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:31:03,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:31:03,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:31:03,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:31:03,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:31:03,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:31:03,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:31:03,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:31:03,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:31:03,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:31:03,596 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:31:03,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:31:03,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:31:03,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:31:03,599 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:31:03,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:31:03,599 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:31:03,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:31:03,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:31:03,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:31:03,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:31:03,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:31:03,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:31:03,600 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:31:03,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:31:03,601 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:31:03,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:31:03,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:31:03,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:31:03,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:31:03,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:31:03,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:31:03,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:31:03,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:31:03,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:31:03,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:31:03,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:31:03,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:31:03,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:31:03,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:31:03,895 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:31:03,898 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:31:03,900 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:31:03,900 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:31:03,901 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label42.c [2019-11-06 22:31:03,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37c070ce/5ff98a574c1a40468879fb814ae4a720/FLAG8138a281b [2019-11-06 22:31:04,504 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:31:04,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label42.c [2019-11-06 22:31:04,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37c070ce/5ff98a574c1a40468879fb814ae4a720/FLAG8138a281b [2019-11-06 22:31:04,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37c070ce/5ff98a574c1a40468879fb814ae4a720 [2019-11-06 22:31:04,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:31:04,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:31:04,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:04,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:31:04,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:31:04,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:04" (1/1) ... [2019-11-06 22:31:04,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50356fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:04, skipping insertion in model container [2019-11-06 22:31:04,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:04" (1/1) ... [2019-11-06 22:31:04,836 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:31:04,906 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:31:05,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:05,438 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:31:05,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:05,600 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:31:05,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05 WrapperNode [2019-11-06 22:31:05,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:05,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:31:05,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:31:05,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:31:05,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... [2019-11-06 22:31:05,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... [2019-11-06 22:31:05,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... [2019-11-06 22:31:05,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... [2019-11-06 22:31:05,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... [2019-11-06 22:31:05,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... [2019-11-06 22:31:05,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... [2019-11-06 22:31:05,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:31:05,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:31:05,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:31:05,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:31:05,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:31:05,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:31:05,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:31:05,814 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:31:05,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:31:05,814 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:31:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:31:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:31:05,815 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:31:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:31:05,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:31:05,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:31:07,065 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:31:07,066 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:31:07,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:07 BoogieIcfgContainer [2019-11-06 22:31:07,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:31:07,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:31:07,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:31:07,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:31:07,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:04" (1/3) ... [2019-11-06 22:31:07,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d1d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:07, skipping insertion in model container [2019-11-06 22:31:07,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:05" (2/3) ... [2019-11-06 22:31:07,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328d1d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:07, skipping insertion in model container [2019-11-06 22:31:07,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:07" (3/3) ... [2019-11-06 22:31:07,087 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label42.c [2019-11-06 22:31:07,102 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:31:07,112 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:31:07,125 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:31:07,164 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:31:07,164 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:31:07,164 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:31:07,165 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:31:07,165 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:31:07,165 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:31:07,165 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:31:07,166 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:31:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:31:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:31:07,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:07,228 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:07,229 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:07,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1328102103, now seen corresponding path program 1 times [2019-11-06 22:31:07,244 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:07,244 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202129655] [2019-11-06 22:31:07,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:07,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202129655] [2019-11-06 22:31:07,771 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:07,771 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:07,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136793861] [2019-11-06 22:31:07,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:07,780 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:07,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:07,798 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:31:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:08,818 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:31:08,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:08,820 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-11-06 22:31:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:08,846 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:31:08,846 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:31:08,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:31:08,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:31:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:31:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:31:08,966 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 121 [2019-11-06 22:31:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:08,967 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:31:08,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:31:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:31:08,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:08,972 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:08,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1654189344, now seen corresponding path program 1 times [2019-11-06 22:31:08,973 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:08,974 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705538912] [2019-11-06 22:31:08,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:09,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705538912] [2019-11-06 22:31:09,102 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:09,102 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:31:09,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816945444] [2019-11-06 22:31:09,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:31:09,104 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:09,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:31:09,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:31:09,105 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:31:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:09,909 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:31:09,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:31:09,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2019-11-06 22:31:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:09,916 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:31:09,917 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:31:09,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:31:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:31:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:31:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:31:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-11-06 22:31:09,959 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 131 [2019-11-06 22:31:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:09,959 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-11-06 22:31:09,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:31:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-11-06 22:31:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:31:09,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:09,964 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:09,964 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1456847330, now seen corresponding path program 1 times [2019-11-06 22:31:09,965 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:09,965 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27912772] [2019-11-06 22:31:09,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:10,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27912772] [2019-11-06 22:31:10,318 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:10,318 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:31:10,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736006043] [2019-11-06 22:31:10,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:31:10,319 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:10,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:31:10,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:10,320 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 5 states. [2019-11-06 22:31:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:11,041 INFO L93 Difference]: Finished difference Result 1205 states and 1730 transitions. [2019-11-06 22:31:11,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:31:11,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-11-06 22:31:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:11,048 INFO L225 Difference]: With dead ends: 1205 [2019-11-06 22:31:11,048 INFO L226 Difference]: Without dead ends: 554 [2019-11-06 22:31:11,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:11,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-06 22:31:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-11-06 22:31:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-06 22:31:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 712 transitions. [2019-11-06 22:31:11,079 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 712 transitions. Word has length 132 [2019-11-06 22:31:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:11,080 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 712 transitions. [2019-11-06 22:31:11,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:31:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 712 transitions. [2019-11-06 22:31:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 22:31:11,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:11,083 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:11,083 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:11,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080988, now seen corresponding path program 1 times [2019-11-06 22:31:11,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:11,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526462261] [2019-11-06 22:31:11,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:11,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526462261] [2019-11-06 22:31:11,382 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:11,382 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:31:11,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505110639] [2019-11-06 22:31:11,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:31:11,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:11,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:31:11,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:11,384 INFO L87 Difference]: Start difference. First operand 554 states and 712 transitions. Second operand 5 states. [2019-11-06 22:31:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:11,962 INFO L93 Difference]: Finished difference Result 1184 states and 1552 transitions. [2019-11-06 22:31:11,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:31:11,966 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-11-06 22:31:11,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:11,969 INFO L225 Difference]: With dead ends: 1184 [2019-11-06 22:31:11,970 INFO L226 Difference]: Without dead ends: 554 [2019-11-06 22:31:11,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:31:11,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-11-06 22:31:11,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-11-06 22:31:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-06 22:31:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 708 transitions. [2019-11-06 22:31:11,994 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 708 transitions. Word has length 133 [2019-11-06 22:31:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:11,994 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 708 transitions. [2019-11-06 22:31:11,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:31:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 708 transitions. [2019-11-06 22:31:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 22:31:11,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:11,997 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:11,998 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash 982548902, now seen corresponding path program 1 times [2019-11-06 22:31:11,998 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:11,999 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570524832] [2019-11-06 22:31:11,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:12,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570524832] [2019-11-06 22:31:12,085 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:12,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:12,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273204157] [2019-11-06 22:31:12,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:12,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:12,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:12,087 INFO L87 Difference]: Start difference. First operand 554 states and 708 transitions. Second operand 3 states. [2019-11-06 22:31:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:12,567 INFO L93 Difference]: Finished difference Result 1509 states and 1954 transitions. [2019-11-06 22:31:12,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:12,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2019-11-06 22:31:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:12,574 INFO L225 Difference]: With dead ends: 1509 [2019-11-06 22:31:12,574 INFO L226 Difference]: Without dead ends: 961 [2019-11-06 22:31:12,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-11-06 22:31:12,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2019-11-06 22:31:12,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-11-06 22:31:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1180 transitions. [2019-11-06 22:31:12,610 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1180 transitions. Word has length 136 [2019-11-06 22:31:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:12,611 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1180 transitions. [2019-11-06 22:31:12,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1180 transitions. [2019-11-06 22:31:12,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-06 22:31:12,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:12,616 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:31:12,616 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:12,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1610616599, now seen corresponding path program 1 times [2019-11-06 22:31:12,617 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:12,617 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371934915] [2019-11-06 22:31:12,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:12,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371934915] [2019-11-06 22:31:12,746 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805110245] [2019-11-06 22:31:12,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:31:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:12,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:31:12,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:31:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:31:13,005 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:31:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:31:13,127 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [490507466] [2019-11-06 22:31:13,133 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 168 [2019-11-06 22:31:13,196 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:31:13,196 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)